using System;

public class Program

{

    public static void Main()

    {

        Tags permitted = Tags.All;// Tags.Fire | Tags.Earth | Tags.Azure | Tags.Wind;

                Console.WriteLine(permitted);

​

        Tags disallowA = Tags.Fire | Tags.Earth | Tags.Wind;

        Tags disallowB = Tags.Wind | Tags.Azure;

        permitted &= ~disallowA;

        permitted &= ~disallowB;

        Console.WriteLine((Tags) permitted);

        bool hasEarth = permitted.HasFlag(Tags.Water);

        Console.WriteLine(hasEarth);

    }

}

​

[Flags]

public enum Tags

{

    None = 0,

    All = ~None,

    Fire = 1,

    Earth = 1 << 1,

    Water = 1 << 2,

    Wind = 1 << 3,

    Azure = 1 << 4,

}